Tech Briefs

Gears Based on Carbon Nanotubes

Nanometer size gears could be used in molecular-scale machines.

Posted in: Briefs, TSP, Physical Sciences

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Miniature Laser Doppler Velocimeter for Measuring Wall Shear

Interference fringes are configured for sensitivity to a velocity gradient.

Posted in: Briefs, Physical Sciences

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Quadrupole Ion Mass Spectrometer for Masses of 2 to 50 Da

H2, He, O2, and Ar can be quantitated at low concentrations in N2.

Posted in: Briefs, Physical Sciences

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Apparatus for Testing Flat Specimens of Thermal Insulation

An improved design affords flexibility for testing under diverse conditions.

Posted in: Briefs, Physical Sciences

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Instrumentation for Sensitive Gas Measurements

Measurements are based on cavity-enhanced absorption.

Posted in: Briefs, Physical Sciences

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Fabrication of Spherical Reflectors in Outer Space

Process takes advantage of vacuum.

Posted in: Briefs, TSP, Manufacturing & Prototyping

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High-Temperature, High-Load-Capacity Radial Magnetic Bearing

Speed and temperature limits of rollingelement bearings can be exceeded.

Posted in: Briefs, Manufacturing & Prototyping

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